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CVE-2026-46275: Bluetooth: hci_uart: fix UAFs and race conditions in close and init paths

highCVSS 7CVE-2026-46275

CSIRTS triage

vendor: libproduct: libOther
What
The vulnerability addresses use-after-free and race conditions in Bluetooth hci_uart close and init paths.
Who is affected
Deployments using the affected Bluetooth library.
Urgency
Remediation is high urgency due to the potential for exploitation in Bluetooth communications.
Action
Update to the latest version of the Bluetooth library.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46275

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-46275coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Bluetooth

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center